package com.bowen.gulimall.authserver.contoller;

import com.alibaba.fastjson.TypeReference;
import com.bowen.common.constant.AuthServerConstant;
import com.bowen.common.exception.BizCodeEnume;
import com.bowen.common.utils.R;
import com.bowen.common.vo.MemberRespVo;
import com.bowen.gulimall.authserver.feign.MemberFeignService;
import com.bowen.gulimall.authserver.feign.ThirdPartFeignService;
import com.bowen.gulimall.authserver.vo.UserRegistVo;
import com.bowen.gulimall.authserver.vo.UserLoginVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    private ThirdPartFeignService thirdPartFeignService;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Autowired
    private MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面
     * springMVC viewcontroller; 将请求和页面映射
     * @return
     */

    /*@GetMapping("/login.html")
    public String loginPage(){
        return "login";
    }

    @GetMapping("/reg.html")
    public String regPage(){
        return "reg";
    }*/
    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){
        //1.接口防刷
        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60s内不能再发
                return R.error(BizCodeEnume.VAILD_SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.VAILD_SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2.验证码的再次校验，redis,存的时候key-phone , value-code  sms:code: 13037969090 -> 546789
        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code+"_"+System.currentTimeMillis();
        //redis 缓存验证码 ， 防止同一个phone在60秒内再次发送验证码

        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,subString,10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    /**
     *  //重定向携带数据，利用session原理，将数据放在session中，只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉
     *  //TODO 分布式下的session问题
     * @param registVo
     * @param result
     * @param redirectAttributes 模拟重定向携带数据
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo registVo, BindingResult result, RedirectAttributes redirectAttributes){
        if (result.hasErrors()){

            /**
             * map(fieldError -> {
             *                 String field = fieldError.getField();
             *                 String message = fieldError.getDefaultMessage();
             *                 errors.put(field,message);
             *                 return
             *             })
             */

            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField,FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",errors);

            //Request method 'POST' not supported
            //用户注册 -> regist[post] --》转发/reg.html (路径映射默认都是get方式访问的。)
            //如果校验出错，转发到注册页
            return "redirect:http://auth.bowen.com/reg.html";
        }

        //真正注册，调用远程服务进行注册
        //1.校验验证码
        String code = registVo.getCode();
        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + registVo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                //删除验证码 令牌机制
                stringRedisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + registVo.getPhone());
                //验证码通过
                //真正注册，调用远程服务进行注册
                R r = memberFeignService.regist(registVo);
                if (r.getCode() == 0){
                    //成功
                    return "redirect:http://auth.bowen.com/login.html";
                }else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.bowen.com/reg.html";
                }
            }else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.bowen.com/reg.html";
            }
        }else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.bowen.com/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){

        //远程登录
        R r = memberFeignService.login(vo);
        if (r.getCode() == 0){
            //成功 放到session中
            MemberRespVo data = r.getData("data", new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://bowen.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.bowen.com/login.html";
        }

    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null){
            return "login";
        }else {
            return "redirect:http://bowen.com";
        }
    }
}
